*{
    margin: 0;
    padding: 0;
}
.clearfix:before,
.clearfix:after{
    content: "";
    display: block;
    clear: both;
}
.container{
    width: 870px;
    margin: auto;
}
header{
    background-color: #54afdb;
    color: #ffffff;
}
header a{
    color: #ffffff;
}
nav{
    padding-top: 12px;
    padding-bottom: 12px;
}
nav .col{
    width: 33.3333333%;
    float: left;
}
nav:after{
    content: "";
    display: block;
    clear: both;
}
.col-left{
    height: 10px;
}
.col-center{
    text-align: center;
}
.col-right{
    text-align: right;
    font-size: 12px;
    font-weight: bold;
}
.col-right a{
    text-decoration: none;
    position: relative;
    top: 5px;
}
/*banner部分*/
.banner{
    margin-top: 60px;
}
.banner .col{
    width: 50%;
    float: left;
}
.banner:after{
    content: "";
    display: block;
    clear: both;
}
.banner p{
    font-weight: bold;
}
.banner h1{
    font-weight: 300;
    font-size: 37px;
    margin-bottom: 24px;
}
.banner a{
    background-color: #2996cc;
    padding: 15px 50px;
    display: inline-block;
    font-size: 12px;
    font-weight: bold;
    text-decoration: none;
    transition:  .5s;
}
.banner a:hover{
    background-color: #1790cc;
}
.banner img{
    display: block;
    width: 100%;
}
/*主体部分*/
.list{
    margin-top: 60px;
    margin-bottom: 60px;
    padding-bottom: 60px;
    border-bottom: 1px #000000 solid;
}
.list .col{
    width: 22%;
    float: left;
    text-align: center;
    padding-left: 10px;
    padding-right: 10px;
}
.list img{
    margin-bottom: 10px;
}
.list h3{
    font-size: 13px;
    margin-bottom: 10px;
}
.list p{
    font-size: 14px;
    color: #778191;
}
/*首页下载部分的样式*/
.download{
    text-align: center;
    margin-bottom: 60px;
}
.download h2{
    font-size: 28px;
    font-weight: 300;
    color: #2e3b4e;
    margin-bottom: 20px;
}
.download p{
    color: #667083;
    margin-bottom: 30px;
}
/*底部样式*/
footer{
    background-color: #1b2126;
    color: #67737a;
    padding-top: 60px;
    padding-bottom: 60px;
}